After former 'vigilante' stops killing he finds himself going crazy. Kit Odoka, a 15 year old teenager in NYC living everyday with the guilt of killing over 200 criminals.

On the surface, Kit is detached and emotionless, drifting through school and daily life with little purpose. His only constant companion is The Monster, a voice that mocks him, taunts him, and constantly reminds him of the blood on his hands. But then a girl named Aya Kurose finds out his secret.

Ultimately, the plot revolves around a troubled teen who grapples with issues like self-hatred, isolation, and the repercussions of meting out justice to himself. This plot delves into themes such as post-violence psychology, the thin line that separates heroes from monsters, and the conflict arising between a youth who wants to move away from his past and those who want to unearth it. Will he hold his sanity close, or will his mind spiral into a path that he can't control.